JP4855103B2 - Orbit generation apparatus, orbit generation method, and orbit generation program - Google Patents

Description

  The present invention relates to a technique for generating an orbit of an artificial satellite by using an image, for example.

When expressing the orbit of a satellite (spacecraft), six orbit elements expressing the position and velocity of the satellite are used. Conventionally, the ground trace, which is the locus of the satellite projected on the ground surface, was created by setting the numerical values of the six orbital elements. The six elements of the orbit were set based on the experience of experts and others after deciding on a rough orbit.
JP 2000-111359 A

Conventionally, it was necessary to fully understand the definition of six orbit elements in order to set the six orbit elements. In addition, even if the definition of the orbital six elements is understood, advanced expertise other than the orbital six elements is required in order to determine the desired orbital six elements as the ground trace. Therefore, unless it is based on the experience of a person with high expertise, it is impossible to generate the numerical values of the six trajectory elements for creating the desired ground trace, and there is a problem that the desired ground trace cannot be created.
The present invention can generate a desired ground trace and generate a numerical value of the orbital six elements for creating the ground trace even when the knowledge of the orbital six elements is not possessed, for example. It aims to be.

  A trajectory generation device according to an embodiment of the present invention includes a trajectory display unit that displays a satellite trajectory on a display device, a trajectory change unit that changes the trajectory displayed by the trajectory display unit using an input device, and the trajectory change unit. And a six-track element calculation unit that calculates values of the six track elements and stores them in a storage device.

  Further, the trajectory generation device is further based on a restriction information storage unit that stores restriction information that limits a range in which the trajectory change unit can change the trajectory in a storage device, and restriction information stored in the restriction information storage unit, And a change range limiting unit that limits a range in which the trajectory can be changed by a processing device.

  Further, the restriction information storage unit of the trajectory generation device may include at least one of a trajectory length radius, an eccentricity, a trajectory inclination angle, an ascending intersection red longitude, an average near point separation angle, and a near point argument, which are each element of the six trajectories. Or the restriction information about all is stored, and the change range restriction unit restricts the range in which the trajectory can be changed based on the trajectory length radius, and the eccentricity restricts the range in which the trajectory can be changed based on the eccentricity. The rate limiter, the trajectory tilt angle limiter that limits the range in which the trajectory can be changed based on the trajectory tilt angle, the ascending intersection red meridian limiter that limits the range in which the trajectory can be changed based on the ascending intersection, and the average near point It is provided with at least one or all of an average near point separation angle restriction unit that restricts a range in which the trajectory can be changed based on the separation angle and a near point argument restriction unit that restricts a range in which the trajectory can be changed based on the near point argument. And butterflies.

  Furthermore, the restriction information storage unit of the trajectory generation apparatus stores restriction information having a predetermined value of the six elements of the trajectory as a fixed value.

  The trajectory generation device further includes a priority input unit that inputs a priority indicating an order of priority for changing the value of the element with respect to each element of the six trajectory elements. The unit preferentially changes a value of an element having a high priority input by the priority input unit, and calculates a value of each element of the six trajectory elements.

  Further, the trajectory generating device further calculates a trajectory based on the designation information input by the designation information input unit and the designation information input unit for inputting designation information for calculating the trajectory by the input device, and stores the trajectory in the storage device. A trajectory calculation unit, and the trajectory display unit displays the trajectory calculated by the trajectory calculation unit.

  Further, the designation information input unit of the trajectory generation device inputs the value of each element of the orbital six elements as the designation information, and the trajectory calculation unit calculates each element of the orbital six elements input by the designation information input unit. A trajectory that satisfies the value is calculated.

  Furthermore, the trajectory generation device according to the embodiment of the present invention includes a designation information input unit for inputting designation information for calculating a trajectory by an input device, and a trajectory based on the designation information input by the designation information input unit. The trajectory calculation unit that calculates and stores the trajectory in the storage device, the trajectory display unit that displays the trajectory calculated by the trajectory calculation unit on the display device, and the trajectory displayed by the trajectory display unit can select one trajectory. A determination input unit that inputs a determination as to whether or not the input is possible, and the designation information input unit additionally inputs designation information when the decision input unit inputs that the trajectory cannot be selected.

  Further, the trajectory generation device further includes a trajectory input unit for inputting the selected trajectory and a trajectory based on the trajectory input by the trajectory input unit when the determination input unit inputs that the trajectory can be selected by the input device. A trajectory six-element calculation unit that calculates the value of each element of the element and stores the value in a storage device.

A trajectory generation method according to an embodiment of the present invention is a trajectory generation method of a trajectory generation device.
A trajectory display step in which the trajectory display unit displays the trajectory of the satellite on the display device, a trajectory change step in which the trajectory change unit changes the trajectory displayed in the trajectory display step with the input device, and a trajectory changed in the trajectory change step The orbital six element calculating unit calculates a value of each element of the orbital six elements and stores it in a storage device.

A trajectory generation program according to an embodiment of the present invention is a trajectory generation program of a trajectory generation device.
Based on the orbit display step in which the orbit display unit displays the orbit of the satellite on the display device, the orbit change step in which the orbit displayed in the orbit display step is changed by input from the input device, and the orbit changed in the orbit change step. And a six-track orbit element calculating step of calculating a value of each element of the six orbit elements and storing it in a storage device.

  The trajectory generation program further includes a limit information storage step for storing limit information for limiting a range in which the trajectory can be changed in a storage device, and a range in which the trajectory can be changed based on the limit information stored in the limit information storage step. The computer is caused to execute a change range restriction step of restricting the above by a processing device.

  Further, in the restriction information storing step of the trajectory generation program, at least one of trajectory length radius, eccentricity, trajectory inclination angle, ascending intersection red longitude, average near-point separation angle, and peri-point argument, which are each element of the six orbit elements. Alternatively, the restriction information for all is stored, and in the change range restriction step, the orbit length radius restriction step for restricting the range in which the orbit can be changed based on the orbit length radius, and the eccentricity for restricting the range in which the orbit can be changed based on the eccentricity. An average near point, a rate limiting step, a trajectory tilt angle limiting step that limits the range in which the trajectory can be changed based on the trajectory tilt angle, an ascending intersection red meridian limiting step that limits the range in which the trajectory can be changed based on the ascending intersection An average near-point separation angle limiting step that limits the range in which the trajectory can be changed based on the separation angle, and a near-point argument that limits the range in which the trajectory can be changed based on the near-point argument Characterized in that to execute at least one or all the computers with limited steps.

  In the limit information storage step of the trajectory generation program, the limit information having a fixed value as a predetermined element of the six trajectory elements is stored.

  The trajectory generation program further executes a priority input step for inputting the priority indicating the priority order of changing the element value based on the input from the input device for each of the six elements of the trajectory. In the orbital six element calculation step, the value of the element having a high priority input by the priority input unit is preferentially changed, and the value of each element of the orbital six element is calculated.

  The trajectory generation program further calculates a trajectory based on a designation information input step for inputting designation information for calculating a trajectory based on an input from an input device, and the designation information input in the designation information input step. The trajectory calculation step stored in the storage device is executed by a computer, and the trajectory display step displays the trajectory calculated in the trajectory calculation step.

  In the designation information input step of the trajectory generation program, the value of each element of the orbital six elements is input as designation information. In the trajectory calculation step, each element of the orbital six elements input in the designation information input step is input. A trajectory that satisfies the value is calculated.

  Further, in the designation information input step of the trajectory generation program, position information indicating a position is inputted as designation information, and in the trajectory calculation step, a trajectory passing through the position information inputted in the designation information input step is calculated. Features.

  Furthermore, the trajectory generation program according to the embodiment of the present invention includes a designation information input step for inputting designation information for calculating a trajectory based on an input from an input device, and a designation input in the designation information input step. A trajectory calculation step for calculating a trajectory based on the information and storing the trajectory in a storage device, a trajectory display step for displaying the trajectory calculated in the trajectory calculation step on a display device, and a trajectory 1 based on the trajectory displayed in the trajectory display step. If the computer inputs a determination input step for inputting whether or not it can be selected based on an input from the input device, and if the trajectory cannot be selected in the specified information input step, it is specified in the determination input step. It is characterized by additionally inputting information.

  Further, in the trajectory generation program, when the determination input step inputs that the trajectory can be selected, the trajectory input step for inputting the selected trajectory based on the input from the input device, and the trajectory input in the trajectory input step. On the basis of this, the computer is caused to execute a six-track orbit element calculation step of calculating values of the six orbit elements and storing them in a storage device.

  According to the orbit generation device according to the embodiment of the present invention, the orbit change unit changes the orbit of the satellite displayed by the orbit display unit and creates a desired ground trace. Then, based on the created ground trace, the orbital six element calculation unit calculates the value of each element of the orbital six elements. Therefore, even if there is no knowledge of the six elements of the track, it is possible to generate a desired ground trace and a numerical value of the six elements of the track that creates the ground trace.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, an example of the hardware configuration of the trajectory generation device 100 according to the embodiment will be described with reference to FIGS. 1 and 2.

FIG. 1 is a diagram illustrating an example of an appearance of a trajectory generation device 100 according to the embodiment.
In FIG. 1, the trajectory generation device 100 includes a CRT (Cathode Ray Tube) display device 901, a keyboard (K / B) 902, a mouse 903, a compact disc device (CDD) 905, a database 908, a system unit 909, and a server 910. These are connected by cables.
Further, the trajectory generation device 100 is connected to the Internet 940 via a local area network (LAN) 942 and a gateway 941.
Here, the CRT display device 901 is an example of the display device 986.

FIG. 2 is a diagram illustrating an example of a hardware configuration of the trajectory generation device 100 according to the embodiment.
In FIG. 2, the trajectory generation device 100 is a computer and includes a CPU (Central Processing Unit) 911 that executes a program. The CPU 911 is connected via a bus 912 to a ROM (Read Only Memory) 913, a RAM (Random Access Memory) 914, a communication board 915, a CRT display device 901, a K / B 902, a mouse 903, an FDD (Flexible Disk) 904, a CDD 905, a magnetic field. A disk device 920 is connected.
The RAM 914 is an example of a volatile memory. The ROM 913 and the magnetic disk device 920 are examples of a nonvolatile memory. These are examples of the storage device 984.
The communication board 915 is connected to the LAN 942 or the like.
The K / B 902, the mouse 903, and the like are examples of the input device 982.
The CPU 911 is an example of a processing device 980.

Here, the communication board 915 is not limited to the LAN 942 but may be directly connected to the Internet 940 or a WAN (Wide Area Network) such as ISDN. When directly connected to a WAN such as the Internet 940 or ISDN, the trajectory generator 100 is connected to a WAN such as the Internet 940 or ISDN, and the gateway 941 is unnecessary.
The magnetic disk device 920 stores an operating system (OS) 921, a window system 922, a program group 923, and a file group 924. The program group 923 is executed by the CPU 911, the OS 921, and the window system 922.

The program group 923 stores programs that execute functions described as “˜units” in the description of the embodiments described below. The program is read and executed by the CPU 911.
In the file group 924, what is described as “to determination” in the description of the embodiment described below is stored as “to file”.
Also, the arrows in the flowcharts described in the following description of the embodiments mainly indicate data input / output, and the data for the data input / output is the magnetic disk device 920, FD, optical disk, CD, MD. (Mini disc), DVD (Digital Versatile Disk) and other recording media. Alternatively, it is transmitted through a signal line or other transmission medium.

  In addition, what is described as “unit” in the description of the embodiment described below may be realized by firmware stored in the ROM 913. Alternatively, it may be implemented by software alone, hardware alone, a combination of software and hardware, or a combination of firmware.

  In addition, a program that implements the embodiment described below may be stored using a recording device using another recording medium such as the magnetic disk device 920, FD, optical disk, CD, MD, DVD, or the like.

Embodiment 1 FIG.
Next, the first embodiment will be described. In the first embodiment, a trajectory generating apparatus 100 that generates a target trajectory by changing the trajectory displayed on the display device 986 or the like using an input device 982 or the like, and calculates six trajectory elements from the generated trajectory will be described.

First, an outline of the trajectory generation device 100 according to the first embodiment will be described based on FIGS. 3 and 4. FIG. 3 is a diagram illustrating an example of a satellite orbit. FIG. 4 is a diagram showing a ground trace of the track shown in FIG.
Here, for example, consider obtaining the orbit of a satellite passing over Tokyo and six orbital elements of the orbit. In this case, in the past, experts and others have sought six orbit elements that meet the above conditions based on experience. However, in the trajectory generation device 100 according to the first embodiment, first, the ground trace of a predetermined trajectory is displayed on the display device 986. Here, as the predetermined trajectory, for example, an example of a trajectory prepared in advance such as a circular trajectory on the equator is displayed. Assume that the displayed trajectory is a trajectory 200 shown in FIG. Next, for example, the trajectory generation device 100 changes the position 201 of the trajectory 200 shown in FIG. 4 to the position 210 in Tokyo using the input device 982 such as the mouse 903. The trajectory generation device 100 generates a desired trajectory by this operation. Here, the trajectory generation device 100 calculates the six trajectory elements based on the trajectory 220 after the change. In this way, the trajectory generation device 100 can obtain the trajectory passing over Tokyo and the six trajectory elements that obtain the trajectory.
In the above description, the ground trace of the orbit is displayed on the display device 986 and changed by the input device 982. However, the present invention is not limited to this. For example, the trajectory shown in FIG. 3 may be displayed on the display device 986 and changed by the input device 982. In the following, the trajectory shown in FIG. 3 and the ground trace shown in FIG. 4 are simply expressed as trajectories.

  The method of changing the trajectory 200 so as to pass the Tokyo position 210 is not limited to the method of moving the position 201 to the Tokyo position 210 as described above. For example, the trajectory generation device 100 according to the first embodiment can change the trajectory by moving the position 202 of the trajectory 200 to the position 210 in Tokyo by the input device 982. Here, the changed trajectory differs between when the position 201 is moved to the position 210 and when the position 202 is moved to the position 210. That is, the values of the six trajectory elements calculated based on the changed trajectory are also different.

Here, there is a case where the position of the track is not established as the track by moving to a different position. When the position of the trajectory is moved to another position and cannot be formed as a trajectory, the trajectory generation apparatus 100 according to the first embodiment generates, for example, a warning sound or displays a warning on the screen. Warning does not allow the change.
In other words, in the above example, when the position 201 is moved to the position 210, the trajectory is established even after the change, but when the position 202 is moved to the position 210, the trajectory is not established after the change. Sometimes.

  Next, the orbital six elements will be described. The orbital six elements are the orbital length radius, the eccentricity, the orbit inclination angle, the ascending intersection red longitude, the average near-point separation angle, and the near-point argument, and the position and velocity of the satellite can be obtained from the orbital six elements. The orbital long radius is the long radius of an ellipse drawn by the orbit of the satellite. Eccentricity represents the shape of an ellipse drawn by the orbit of the satellite. If the shape of the ellipse is a perfect circle, the eccentricity is zero. The orbit inclination angle is an angle at which the plane represented by the orbit of the satellite and the equatorial plane of the earth intersect. A so-called polar orbit, orbit passing over the north and south poles, has an orbit inclination angle of approximately 90 °. On the other hand, when the orbit inclination angle is 0 °, the orbit passes on the equator. The ascending intersection is the ascending point at which the orbit of the satellite crosses the equator plane from south to north (ascending intersection). Here, the ecliptic is an angle formed when the equinox and the ascending intersection, which is a point where the ecliptic is defined as 0, are centered on the earth. The average near point separation angle is an angle from the near point to the satellite when it is assumed that the satellite moves at a predetermined angular velocity when viewed from the center of the orbit of the satellite. The near point argument is an angle formed from the ascending intersection point toward the near point when viewed from the center of the earth. Here, the near point is a point where the satellite is closest to the earth in the orbit of the satellite.

  Next, the function of the trajectory generation device 100 according to the first embodiment will be described with reference to FIG. FIG. 5 is a functional block diagram illustrating functions of the trajectory generation device 100 according to the first embodiment.

  The trajectory generation device 100 includes an input unit 110, a processing unit 120, a display unit 140, a storage unit 150, a processing device 980, an input device 982, a storage device 984, and a display device 986.

The input unit 110 includes a priority input unit 112, a trajectory change unit 114, and a designation information input unit 116.
The priority input unit 112 inputs the priority indicating the priority order of changing the value of the element to each element of the six elements of the trajectory by the input device 982. The priority is not limited to the priority order, and may be a ratio for changing the value of each element.
The trajectory changing unit 114 uses the input device 982 to change the trajectory displayed by the trajectory display unit 142 described later. The trajectory changing unit 114 changes the trajectory by, for example, moving the position of a point on the trajectory to another position with the mouse 903 or the like, or changing the shape and orientation of the trajectory.
The designation information input unit 116 uses the input device 982 to input designation information for calculating a trajectory. The designation information input unit 116 inputs, for example, the value of each element of the orbital six elements as designation information. When the designation information input unit 116 inputs the value of each element of the six trajectories as the designation information, it is not necessary to input an accurate value representing the created trajectory.

The processing unit 120 includes a trajectory calculation unit 122, a trajectory six element calculation unit 124, and a change range restriction unit 130.
The trajectory calculation unit 122 calculates a trajectory based on the designation information input by the designation information input unit 116 and stores the trajectory in the storage device 984. For example, when the designation information input unit 116 inputs the value of each element of the six orbit elements as the designation information, the trajectory calculation unit 122 calculates a trajectory that satisfies the value of each element of the inputted six orbit elements.
The orbital six element calculation unit 124 calculates the value of each element of the orbital six elements based on the trajectory displayed by the trajectory display unit 142 described later, and stores it in the storage device 984. When the trajectory change unit 114 changes the trajectory, the trajectory six element calculation unit 124 calculates the value of each element of the trajectory six elements based on the trajectory after the trajectory change unit 114 changes. The orbital six element calculation unit 124 preferentially changes the value of the element having a high priority input by the priority input unit 112, and calculates the value of each element of the orbital six element.
The change range restriction unit 130 restricts a range in which the trajectory can be changed based on restriction information stored in a restriction information storage unit 152 described later. The change range restriction unit 130 considers the dynamics of the trajectory and prevents the trajectory change unit 114 from changing from the trajectory to the failure of the trajectory. The change range limiting unit 130 includes an orbital length radius limiting unit 131, an eccentricity limiting unit 132, an orbit inclination angle limiting unit 133, an ascending intersection red longitude limiting unit 134, an average near point separation angle limiting unit 135, and a near point argument limiting unit 136. Provide at least any or all.
The track length radius limiter 131 limits the range in which the track can be changed based on the track length radius. For example, the trajectory length radius limiting unit 131 limits the input to only allow an altitude of 0 km (kilometer) or higher.
The eccentricity limiting unit 132 limits the range in which the trajectory can be changed based on the eccentricity. The eccentricity restriction unit 132 restricts, for example, to allow only 0 or more and less than 1.
The track inclination angle limiting unit 133 limits the range in which the track can be changed based on the track inclination angle. For example, the orbit inclination angle restriction unit 133 restricts only 0 ° or more and 180 ° or less.
The ascending intersection red longitude restriction unit 134 restricts the range in which the trajectory can be changed based on the ascending intersection red longitude. The ascending intersection red longitude restriction unit 134 restricts, for example, to allow only 0 ° to 360 °.
The average near point separation angle restriction unit 135 restricts a range in which the trajectory can be changed based on the average near point separation angle. For example, the average near-point separation angle restriction unit 135 restricts that only 0 ° or more and 360 ° or less are allowed.
The perimeter argument restricting unit 136 restricts the range in which the trajectory can be changed based on the perimeter argument. The perimeter argument restriction unit 136 restricts, for example, to allow only 0 ° or more and 360 ° or less.

The display unit 140 includes a trajectory display unit 142.
The orbit display unit 142 displays the orbit of the satellite on the display device 986. In addition, the trajectory display unit 142 displays the trajectory calculated by the trajectory calculation unit 122.

The storage unit 150 includes a restriction information storage unit 152.
The restriction information storage unit 152 stores, in the storage device 984, restriction information that restricts a range in which the trajectory changing unit 114 can change the trajectory. The restriction information storage unit 152 stores restriction information on at least one or all of the orbital length radius, the eccentricity, the orbital inclination angle, the ascending intersection red angle, the average near point separation angle, and the near point argument, which are each element of the six elements of the orbit. Remember. In addition, the restriction information storage unit 152 stores restriction information in which predetermined elements of the six orbit elements are fixed values, for example.

  Next, the operation of the trajectory generating apparatus 100 according to the first embodiment will be described based on FIG. FIG. 6 is a flowchart illustrating the trajectory generation method that is the operation of the trajectory generation apparatus 100 according to the first embodiment and the processing contents of the trajectory generation program of the trajectory generation apparatus 100.

  First, in the restriction information storage step (S101), the restriction information storage unit 152 stores restriction information for restricting a range in which the trajectory can be changed in a storage device. The restriction information storage unit 152 is, for example, a restriction on at least one or all of the orbital length radius, the eccentricity, the orbit inclination angle, the ascending intersection red longitude, the average near point separation angle, and the near point argument, which are each element of the six elements of the orbit. Store information.

  Subsequent to (S101), in the change range restriction step (S102), the change range restriction unit 130 restricts the range in which the trajectory can be changed based on the restriction information stored in the restriction information storage unit 152. The change range restriction unit 130 restricts at least one or all of, for example, the orbital length radius, the eccentricity, the orbit inclination angle, the ascending intersection red longitude, the average near point separation angle, and the near point argument, which are each element of the six orbit elements. . That is, in the change range limiting step, the track length radius limiting step for limiting the range in which the track can be changed based on the track length radius, the eccentricity limiting step for limiting the range in which the track can be changed based on the eccentricity, and the track inclination angle A trajectory inclination angle limiting step that limits the range in which the trajectory can be changed based on a trajectory, an ascending intersection red meridian limiting step that limits the range in which the trajectory can be changed based on the rising intersection red longitude, and a range in which the trajectory can be changed based on the average near point separation angle The change range restriction unit 130 executes at least one or all of the average near point separation angle restriction step for restricting the distance and the near point argument restriction step for restricting the range in which the trajectory can be changed based on the near point argument.

  On the other hand, in parallel with (S101) and (S102), in the designation information input step (S103), the designation information input unit 116 inputs the designation information for calculating the trajectory by the input device 982. The designation information input unit 116 inputs, for example, the value of each element of the orbital six elements as designation information.

  Subsequent to (S103), in the trajectory calculation step (S104), the trajectory calculation unit 122 calculates a trajectory based on the designation information input by the designation information input unit 116 and stores the trajectory in the storage device 984. Here, the orbit is calculated using a method usually used in the calculation of the satellite orbit such as an equation of motion of constant-velocity circular motion around the earth or an elliptical orbit.

  Subsequent to (S104), in the orbit display step (S105), the orbit display unit 142 displays the orbit of the satellite calculated by the orbit calculation unit 122 on the display device 986.

  Subsequent to (S102) and (S105), in the trajectory changing step (S106), the trajectory changing unit 114 changes the trajectory displayed by the trajectory display unit 142 with the input device 982 under the restriction of the change range restricting unit 130. .

  On the other hand, in parallel with (S101) to (S106), in the priority input step (S107), the priority input unit 112 indicates the priority for changing the element value for each element of the six elements of the trajectory. Enter the priority.

  Following (S106) and (S107), in the orbital six element calculation step (S108), the orbital six element calculation unit 124 converts the priority input by the priority input unit 112 and the trajectory changed by the trajectory changing unit 114. Based on this, the value of each element of the six trajectory elements is calculated by the processing device 980 and stored in the storage device 984.

  Here, the designation information input unit 116 may not input the designation information in the designation information input step (S103). In this case, for example, in the trajectory calculation step (S104), the trajectory calculation unit 122 calculates a predetermined trajectory, and in the trajectory display step (S105), the trajectory display unit 142 calculates the predetermined trajectory calculated by the trajectory calculation unit 122. It may be displayed on the display device 986.

  Conventionally, in order to create a desired trajectory, it was necessary to have a high level of expertise. However, according to the trajectory generation device 100 according to the first exemplary embodiment, the trajectory display unit 142 obtains a trajectory by changing the trajectory displayed on the display device 986 by the trajectory changing unit 114 using the input device 982. Then, based on the obtained trajectory, the trajectory six element calculation unit 124 calculates the trajectory six elements by the processing device 980. Therefore, according to the trajectory generation device 100 according to the first embodiment, even if the user does not have knowledge of the trajectory six elements and the like, the desired trajectory and the six trajectory elements that create the trajectory are generated. Numerical values can be generated.

  Conventionally, the trajectory is created from the six trajectory elements. However, according to the trajectory generating apparatus 100 according to the first embodiment, the six trajectory elements can be calculated by creating the trajectory.

Embodiment 2. FIG.
Next, a second embodiment will be described. In the second embodiment, a trajectory generation apparatus 100 that limits a trajectory by additionally inputting designation information and identifies a trajectory will be described. That is, in the second embodiment, the trajectory displayed on the display device 986 is not changed by the input device 982 to create a trajectory, but the designation information is additionally input when there are a plurality of trajectories displayed on the display device 986. To limit the trajectory.

  First, the function of the trajectory generation device 100 according to the second embodiment will be described with reference to FIG. FIG. 7 is a functional block diagram illustrating functions of the trajectory generation device 100 according to the second embodiment. Here, only the parts of the function of the trajectory generation apparatus 100 according to the second embodiment that are different from the function of the trajectory generation apparatus 100 according to the first embodiment will be described.

The input unit 110 includes a determination input unit 117 and a trajectory input unit 118 in addition to the trajectory generation device 100 according to the first embodiment. The input unit 110 may not include the priority input unit 112 and the trajectory changing unit 114.
Based on the trajectory displayed by the trajectory display unit 142, the determination input unit 117 inputs a determination as to whether or not one trajectory can be selected by the input device 982. That is, when a plurality of trajectories are displayed on the display device 986, the determination input unit 117 can specify a desired trajectory from among them, or can additionally input designation information to further limit the trajectory. select.
When the determination input unit 117 inputs that the trajectory can be selected, the trajectory input unit 118 selects the trajectory and inputs it using the input device 982.
In addition, the designation information input unit 116 here inputs, for example, position information indicating the position through which the trajectory passes as designation information. Furthermore, when the position information indicating a plurality of positions is input as the designation information, the designation information input unit 116 inputs, as the designation information, the time from when the satellite passes a certain position to the next position. It doesn't matter. Furthermore, the designation information input unit 116 may designate a value of a predetermined element of the orbital six elements, or may input designation information that is within a predetermined range.

The trajectory calculation unit 122 calculates a trajectory based on the designation information input by the designation information input unit 116 and stores it in the storage device 984 under the restriction of the change range restriction unit 130. In the first embodiment, when the trajectory changing unit 114 changes the trajectory, the change range restricting unit 130 is restricted, so the trajectory calculating unit 122 does not need to consider the restriction of the change range restricting unit 130. However, in the second embodiment, since the trajectory changing unit 114 does not change the trajectory, it is necessary to consider the limitation of the change range limiting unit 130 when the trajectory calculating unit 122 calculates the trajectory.
There may be a plurality of trajectories calculated by the trajectory calculation unit 122. When there are a plurality of calculated trajectories, the trajectory display unit 142 displays all of the plurality of trajectories. That is, in this case, the determination input unit 117 inputs whether or not a specific trajectory can be selected from a plurality of displayed trajectories.

  When the determination input unit 117 inputs that the trajectory can be selected and the trajectory input unit 118 selects the trajectory, the trajectory six element calculation unit 124 selects the trajectory six based on the trajectory selected and input by the trajectory input unit 118. The value of each element of the element is calculated and stored in the storage device 984. On the other hand, when the determination input unit 117 inputs that the trajectory cannot be selected, the designation information input unit 116 additionally inputs designation information.

  Next, the operation of the trajectory generating apparatus 100 according to the second embodiment will be described based on FIG. FIG. 8 is a flowchart illustrating the trajectory generation method that is the operation of the trajectory generation apparatus 100 according to the second embodiment and the processing contents of the trajectory generation program of the trajectory generation apparatus 100.

  (S201) to (S203) are the same as (S101) to (S103) in the first embodiment.

  Subsequent to (S202) and (S203), in the trajectory calculation step (S204), the trajectory calculation unit 122 determines the trajectory under the restriction of the change range restriction unit 130 based on the designation information input by the designation information input unit 116. Calculated by the processing device 980 and stored in the storage device 984.

  Subsequent to (S204), in the trajectory display step (S205), the trajectory display unit 142 displays all the trajectories calculated by the trajectory calculation unit 122, for example.

  Subsequent to (S205), in the determination input step (S206), the determination input unit 117 inputs, based on the trajectory displayed by the trajectory display unit 142, whether or not one trajectory can be selected by the input device 982. . If the determination input unit 117 inputs that it can be selected (selectable in S206), the process proceeds to the trajectory input step (S207). If the determination input unit 117 inputs that it cannot be selected (selection is not possible in S206), the process returns to (S203), and the designation information input unit 116 additionally inputs designation information.

  In the trajectory input step (S207), the trajectory input unit 118 inputs the selected trajectory.

  Subsequent to (S207), in the orbital six element calculation step (S208), the orbital six element calculation unit 124 calculates the value of each element of the orbital six elements by the processing device 980 based on the trajectory selected by the trajectory input unit 118. And stored in the storage device 984.

  According to the trajectory generation device 100 according to the second exemplary embodiment, the designation information input unit 116 additionally inputs designation information until the trajectory can be selected, and the trajectory calculation unit 122 calculates the trajectory based on the designation information. Therefore, according to the trajectory generation device 100 according to the second embodiment, even if the user does not have knowledge of the six trajectories, the desired trajectory can be input by inputting the designation information when creating the trajectory. , And six orbital element values that create the trajectory. That is, according to the trajectory generating apparatus 100 according to the second embodiment, even if the user does not have advanced expertise, the trajectory can be created by specifying the conditions desired by the user. In addition, six trajectory elements for creating the trajectory can be calculated.

  In the above embodiment, the trajectory calculation unit 122 calculates each element of the six trajectories. However, the present invention is not limited to this. For example, an element having six trajectory elements may be fixed, and the trajectory calculation unit 122 may calculate only the remaining elements.

  Further, the trajectory generation device 100 may have both the function of changing the trajectory displayed on the display device 986 of the first embodiment by the input device 982 and the function of additionally inputting the designation information of the second embodiment. I do not care.

It is the figure which showed an example of the external appearance of the track | orbit production | generation apparatus 100 concerning embodiment. It is a figure which shows an example of the hardware constitutions of the track | orbit production | generation apparatus 100 in embodiment. It is a figure which shows an example of the orbit of a satellite. It is the figure which showed the ground trace of the track | orbit shown in FIG. FIG. 3 is a functional block diagram showing functions of the trajectory generation device 100 according to the first embodiment. 3 is a flowchart illustrating a trajectory generation method that is an operation of the trajectory generation apparatus 100 according to the first embodiment and a processing content of a trajectory generation program of the trajectory generation apparatus 100. It is a functional block diagram which shows the function of the trajectory generation apparatus 100 concerning Embodiment 2. FIG. 5 is a flowchart illustrating a trajectory generation method that is an operation of the trajectory generation apparatus 100 according to the second embodiment and a processing content of a trajectory generation program of the trajectory generation apparatus 100.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 orbit generator 110 input part 112 priority input part 114 orbit change part 116 designation information input part 117 determination input part 118 orbit input part 120 processing part 122 orbit calculation part 124 orbit six element calculation Part, 130 change range restriction part, 131 orbit length radius restriction part, 132 eccentricity restriction part, 133 orbit inclination angle restriction part, 134 ascending intersection red longitude restriction part, 135 average near point separation angle restriction part, 136 near point argument restriction part , 140 display unit, 142 orbit display unit, 150 storage unit, 152 restriction information storage unit, 901 CRT display device, 902 K / B, 903 mouse, 904 FDD, 905 CDD, 908 database, 909 system unit, 910 server, 911 CPU, 912 bus, 913 ROM, 914 RAM, 915 communication port 920, magnetic disk unit, 921 OS, 922 window system, 923 program group, 924 file group, 931 telephone, 932 FAX machine, 940 Internet, 941 gateway, 942 LAN, 980 processing unit, 982 input unit, 984 storage unit 986 Display device.

Claims (19)

An orbit display unit for displaying the orbit of the satellite on the display device;
A limit information storage unit for storing limit information for limiting a range in which the trajectory can be changed in a storage device;
Based on the restriction information stored by the restriction information storage unit, a change range restriction unit that restricts the range in which the trajectory can be changed by the processing device;
A trajectory changing unit that changes the trajectory displayed by the trajectory display unit by an input device within a range limited by the change range limiting unit ;
A trajectory generation device comprising: a trajectory six element calculation unit that calculates values of each element of the six trajectory elements based on the trajectory changed by the trajectory change unit and stores the values in a storage device. The restriction information storage unit stores restriction information on at least one or all of the orbital length radius, the eccentricity, the orbit inclination angle, the ascending intersection red longitude, the average near point departure angle, and the near point argument, which are each element of the six elements of the orbit. Remember,
The change range restriction part
A trajectory length radius limiter that limits the range in which the trajectory can be changed based on the trajectory radius,
An eccentricity limiting unit that limits the range in which the trajectory can be changed based on the eccentricity; and
An orbit inclination angle limiter for limiting the range in which the orbit can be changed based on the orbit inclination angle; and
Ascending intersection red meridian restricting section that limits the range in which the trajectory can be changed based on the ascending intersection red meridian,
An average near point separation angle limiting unit that limits the range in which the trajectory can be changed based on the average near point separation angle;
Trajectory generator according to claim 1, characterized in that it comprises at least any or all of the argument of perigee limiting unit for limiting the range for changing the trajectory based on the argument of perigee. The restriction information storage section, the trajectory generation apparatus according to claim 1, wherein the storing restriction information for a given element of orbital six elements and a fixed value. The trajectory generator further includes:
For each element of the orbital six elements, a priority input unit for inputting a priority indicating an order of priority for changing the value of the element by an input device,
The track 6 element calculation unit preferentially changes a value of a high priority element input by the priority input unit, and calculates a value of each element of the track 6 element. Orbit generator. The trajectory generator further includes:
A designation information input unit for inputting designation information when calculating a trajectory by an input device;
A trajectory calculation unit that calculates a trajectory based on the designation information input by the designation information input unit and stores the trajectory in a storage device;
The trajectory generation apparatus according to claim 1, wherein the trajectory display unit displays the trajectory calculated by the trajectory calculation unit. The specified information input unit inputs the values of each element of the orbital six elements as specified information,
The trajectory generation apparatus according to claim 5 , wherein the trajectory calculation unit calculates a trajectory that satisfies the values of the six elements of the trajectory input by the designation information input unit. The specified information input unit inputs position information indicating a position as specified information,
6. The trajectory generation apparatus according to claim 5 , wherein the trajectory calculation unit calculates a trajectory passing through the position information input by the designation information input unit. A designation information input unit for inputting designation information when calculating a trajectory by an input device;
A trajectory calculation unit that calculates a trajectory based on the designation information input by the designation information input unit and stores the trajectory in a storage device;
A trajectory display unit that displays the trajectory calculated by the trajectory calculation unit on a display device;
A determination input unit that inputs whether or not a single track can be selected based on the track displayed by the track display unit by an input device;
The trajectory generation device, wherein the designation information input unit additionally inputs designation information when the determination input unit inputs that the trajectory cannot be selected. The trajectory generator further includes:
When the determination input unit inputs that the trajectory can be selected, a trajectory input unit that inputs the selected trajectory by an input device;
9. The trajectory generation apparatus according to claim 8, further comprising: a trajectory six element calculation unit that calculates a value of each element of the trajectory six elements based on the trajectory input by the trajectory input unit and stores the value in a storage device. In the trajectory generation method of the trajectory generator,
An orbit display step in which the orbit display unit displays the orbit of the satellite on the display device; and
A limit information storage step for storing limit information for limiting a range in which the trajectory can be changed in a storage device;
Based on the restriction information stored in the restriction information storage step, a change range restriction step in which the change range restriction unit restricts the range in which the trajectory can be changed by the processing device,
The trajectory change step in which the trajectory changing unit changes the trajectory displayed in the trajectory display step within the range restricted by the change range restricting step by the input device,
A trajectory generation method comprising: a trajectory six element calculation step in which a value of each element of the six trajectory elements is calculated based on the trajectory changed in the trajectory change step and stored in a storage device. In the trajectory generation program of the trajectory generator,
An orbit display step for displaying the orbit of the satellite on the display device;
A limit information storage step for storing limit information for limiting a range in which the trajectory can be changed in a storage device;
Based on the restriction information stored in the restriction information storage step, a change range restriction step for restricting the range in which the trajectory can be changed by the processing device;
A trajectory change step for changing the trajectory displayed in the trajectory display step by an input from an input device within a range restricted by the change range restriction step ;
A trajectory generation program for causing a computer to execute a trajectory six-element calculation step of calculating values of each element of the six trajectories based on the trajectory changed in the trajectory change step and storing the values in a storage device. In the restriction information storage step, restriction information on at least one or all of the orbital length radius, the eccentricity, the orbit inclination angle, the ascending intersection red longitude, the average near point separation angle, and the near point argument, which are each element of the six elements of the orbit, is obtained. Remember,
In the change range restriction step above,
A trajectory length radius limiting step for limiting the range in which the trajectory can be changed based on the trajectory radius,
An eccentricity limiting step for limiting the range in which the trajectory can be changed based on the eccentricity;
An orbit inclination angle limiting step for limiting the range in which the orbit can be changed based on the orbit inclination angle;
Ascending intersection red meridian restriction step for restricting the range in which the trajectory can be changed based on the ascending intersection red meridian;
An average near point separation angle limiting step for limiting a range in which the trajectory can be changed based on the average near point separation angle;
12. The trajectory generation program according to claim 11 , wherein the computer executes at least one or all of the perimeter argument limiting step of limiting a range in which the trajectory can be changed based on the perimeter argument. 12. The trajectory generation program according to claim 11, wherein in the limit information storing step, limit information having a fixed value for a predetermined element of the six trajectories is stored. The trajectory generation program further includes:
For each element of the six elements of the orbit, let the computer execute a priority input step of inputting a priority indicating the priority of changing the value of the element based on the input from the input device,
In the orbital six elements calculation step, the value of priority the priority input unit inputs a high element change priority, according to claim 11, wherein the calculating the value of each element of the orbital six elements Orbital generation program. The trajectory generation program further includes:
A designation information input step for inputting designation information when calculating a trajectory based on an input from an input device;
Causing the computer to execute a trajectory calculation step of calculating a trajectory based on the designation information input in the designation information input step and storing the trajectory in a storage device;
12. The trajectory generation program according to claim 11 , wherein the trajectory display step displays the trajectory calculated in the trajectory calculation step. In the specified information input step, the value of each element of the orbital six elements is input as the specified information,
16. The trajectory generation program according to claim 15 , wherein in the trajectory calculation step, a trajectory that satisfies the value of each element of the six trajectories input in the designation information input step is calculated. In the specified information input step, position information indicating the position is input as the specified information.
16. The trajectory generation program according to claim 15 , wherein in the trajectory calculation step, a trajectory passing through the position information input in the designation information input step is calculated. A designation information input step for inputting designation information when calculating a trajectory based on an input from an input device;
A trajectory calculation step of calculating a trajectory based on the designation information input in the designation information input step and storing the trajectory in a storage device;
A trajectory display step for displaying the trajectory calculated in the trajectory calculation step on a display device;
Based on the trajectory displayed in the trajectory display step, the computer executes a determination input step for inputting whether the trajectory can be selected based on an input from the input device,
A trajectory generating program characterized in that in the designation information input step, designation information is additionally inputted when a trajectory cannot be selected in the determination input step. In the above trajectory generation program,
When inputting in the determination input step that the trajectory can be selected, the trajectory input step for inputting the selected trajectory based on the input from the input device;
19. The trajectory generation according to claim 18, further comprising: causing a computer to execute a trajectory six element calculation step of calculating a value of each element of the trajectory six elements based on the trajectory input in the trajectory input step and storing the value in a storage device. program.

Images